One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.
Car Problem Reports
Chevrolet Suburban 1500 Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail
Chevrolet Suburban 1500 Problem
Average Mileage: 212,500 mi (175,000 mi - 250,000 mi)